After Jose Cruz Jr. hits his 20th homer in a 6 – 3 win over the Expos, the Blue Jays become the first team in major league history to have four batters hit 20 or more homers before the All-Star break.

This Day In Baseball

On July 8, 2000 — After Jose Cruz Jr. hits his 20th homer in a 6 – 3 win over the Expos, the Blue Jays become the first team in major league history to have four batters hit 20 or more homers before the All-Star break.

Source:
Baseball Reference July 8